while pondering the possibility of naval yards I realised something, if one team's naval yard gets destroyed the other team then has a strong advantage they could just buy a boat and travel on water. This is where the problem will occur they will be in a zone where the enemy can't reach. the only solution I could think of is making all these maps have aircraft support so they can still be destroyable. Not trying to appear that I'm extremely anti-navy just something I should mention.